本文根据相似理论 ,对多裂隙直接顶的破坏问题进行了模拟实验及控制研究。按照不同老顶失稳方式、直接顶裂隙及块体形式设计制作了 6个模型 ,采用摄影量测法及网格图法处理实验结果。根据实验结果分析了多裂隙直接顶破坏冒顶规律并提出了控制措施。 Based on the similarity theory, this paper conducts the simulation experiment and the control research on the failure of multi-fracture direct roof. Six models were designed and manufactured according to different methods of instability of old roof, direct roof crevasse and block form, and the experimental results were processed by photogrammetry and grid graph method. According to the experimental results, the law of roof collapse by multiple fractures is analyzed and the control measures are put forward.